A materials exchange is a free online service that allows companies or organizations to list surplus resources, making them available for use by another, either for sale or free. This may encompass a wide range of materials, perhaps...

As an individual you can re-use more items in your day-to-day activities. Here are a few ideas (but there are many more for you to discover!):
Reusing your shopping bags is a very useful tip. You can even get a "bag for life...